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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/uapi/linux/spi/spi.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/uapi/linux/spi/spi.h')
-rw-r--r-- | include/uapi/linux/spi/spi.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/uapi/linux/spi/spi.h b/include/uapi/linux/spi/spi.h new file mode 100644 index 000000000..9d5f58059 --- /dev/null +++ b/include/uapi/linux/spi/spi.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ +#ifndef _UAPI_SPI_H +#define _UAPI_SPI_H + +#include <linux/const.h> + +#define SPI_CPHA _BITUL(0) /* clock phase */ +#define SPI_CPOL _BITUL(1) /* clock polarity */ + +#define SPI_MODE_0 (0|0) /* (original MicroWire) */ +#define SPI_MODE_1 (0|SPI_CPHA) +#define SPI_MODE_2 (SPI_CPOL|0) +#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) +#define SPI_MODE_X_MASK (SPI_CPOL|SPI_CPHA) + +#define SPI_CS_HIGH _BITUL(2) /* chipselect active high? */ +#define SPI_LSB_FIRST _BITUL(3) /* per-word bits-on-wire */ +#define SPI_3WIRE _BITUL(4) /* SI/SO signals shared */ +#define SPI_LOOP _BITUL(5) /* loopback mode */ +#define SPI_NO_CS _BITUL(6) /* 1 dev/bus, no chipselect */ +#define SPI_READY _BITUL(7) /* slave pulls low to pause */ +#define SPI_TX_DUAL _BITUL(8) /* transmit with 2 wires */ +#define SPI_TX_QUAD _BITUL(9) /* transmit with 4 wires */ +#define SPI_RX_DUAL _BITUL(10) /* receive with 2 wires */ +#define SPI_RX_QUAD _BITUL(11) /* receive with 4 wires */ +#define SPI_CS_WORD _BITUL(12) /* toggle cs after each word */ +#define SPI_TX_OCTAL _BITUL(13) /* transmit with 8 wires */ +#define SPI_RX_OCTAL _BITUL(14) /* receive with 8 wires */ +#define SPI_3WIRE_HIZ _BITUL(15) /* high impedance turnaround */ +#define SPI_RX_CPHA_FLIP _BITUL(16) /* flip CPHA on Rx only xfer */ + +/* + * All the bits defined above should be covered by SPI_MODE_USER_MASK. + * The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in + * 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards + * while in SPI_MODE_KERNEL_MASK they are from the other end downwards. + * These bits must not overlap. A static assert check should make sure of that. + * If adding extra bits, make sure to increase the bit index below as well. + */ +#define SPI_MODE_USER_MASK (_BITUL(17) - 1) + +#endif /* _UAPI_SPI_H */ |